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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// A set of routines for testing the comparison operators of a type
//
// XXXX6 tests all six comparison operators
// XXXX2 tests only op== and op!=
//
// AssertComparisonsXAreNoexcept static_asserts that the operations are all noexcept.
// AssertComparisonsXReturnBool static_asserts that the operations return bool.
// AssertComparisonsXConvertibleToBool static_asserts that the operations return something convertible to bool.
#ifndef TEST_COMPARISONS_H
#define TEST_COMPARISONS_H
#include <type_traits>
#include "test_macros.h"
// Test all six comparison operations for sanity
template <class T, class U = T>
TEST_CONSTEXPR_CXX14 bool testComparisons6(const T& t1, const U& t2, bool isEqual, bool isLess)
{
if (isEqual)
{
if (!(t1 == t2)) return false;
if (!(t2 == t1)) return false;
if ( (t1 != t2)) return false;
if ( (t2 != t1)) return false;
if ( (t1 < t2)) return false;
if ( (t2 < t1)) return false;
if (!(t1 <= t2)) return false;
if (!(t2 <= t1)) return false;
if ( (t1 > t2)) return false;
if ( (t2 > t1)) return false;
if (!(t1 >= t2)) return false;
if (!(t2 >= t1)) return false;
}
else if (isLess)
{
if ( (t1 == t2)) return false;
if ( (t2 == t1)) return false;
if (!(t1 != t2)) return false;
if (!(t2 != t1)) return false;
if (!(t1 < t2)) return false;
if ( (t2 < t1)) return false;
if (!(t1 <= t2)) return false;
if ( (t2 <= t1)) return false;
if ( (t1 > t2)) return false;
if (!(t2 > t1)) return false;
if ( (t1 >= t2)) return false;
if (!(t2 >= t1)) return false;
}
else /* greater */
{
if ( (t1 == t2)) return false;
if ( (t2 == t1)) return false;
if (!(t1 != t2)) return false;
if (!(t2 != t1)) return false;
if ( (t1 < t2)) return false;
if (!(t2 < t1)) return false;
if ( (t1 <= t2)) return false;
if (!(t2 <= t1)) return false;
if (!(t1 > t2)) return false;
if ( (t2 > t1)) return false;
if (!(t1 >= t2)) return false;
if ( (t2 >= t1)) return false;
}
return true;
}
// Easy call when you can init from something already comparable.
template <class T, class Param>
TEST_CONSTEXPR_CXX14 bool testComparisons6Values(Param val1, Param val2)
{
const bool isEqual = val1 == val2;
const bool isLess = val1 < val2;
return testComparisons6(T(val1), T(val2), isEqual, isLess);
}
template <class T, class U = T>
void AssertComparisons6AreNoexcept()
{
ASSERT_NOEXCEPT(std::declval<const T&>() == std::declval<const U&>());
ASSERT_NOEXCEPT(std::declval<const T&>() != std::declval<const U&>());
ASSERT_NOEXCEPT(std::declval<const T&>() < std::declval<const U&>());
ASSERT_NOEXCEPT(std::declval<const T&>() <= std::declval<const U&>());
ASSERT_NOEXCEPT(std::declval<const T&>() > std::declval<const U&>());
ASSERT_NOEXCEPT(std::declval<const T&>() >= std::declval<const U&>());
}
template <class T, class U = T>
void AssertComparisons6ReturnBool()
{
ASSERT_SAME_TYPE(decltype(std::declval<const T&>() == std::declval<const U&>()), bool);
ASSERT_SAME_TYPE(decltype(std::declval<const T&>() != std::declval<const U&>()), bool);
ASSERT_SAME_TYPE(decltype(std::declval<const T&>() < std::declval<const U&>()), bool);
ASSERT_SAME_TYPE(decltype(std::declval<const T&>() <= std::declval<const U&>()), bool);
ASSERT_SAME_TYPE(decltype(std::declval<const T&>() > std::declval<const U&>()), bool);
ASSERT_SAME_TYPE(decltype(std::declval<const T&>() >= std::declval<const U&>()), bool);
}
template <class T, class U = T>
void AssertComparisons6ConvertibleToBool()
{
static_assert((std::is_convertible<decltype(std::declval<const T&>() == std::declval<const U&>()), bool>::value), "");
static_assert((std::is_convertible<decltype(std::declval<const T&>() != std::declval<const U&>()), bool>::value), "");
static_assert((std::is_convertible<decltype(std::declval<const T&>() < std::declval<const U&>()), bool>::value), "");
static_assert((std::is_convertible<decltype(std::declval<const T&>() <= std::declval<const U&>()), bool>::value), "");
static_assert((std::is_convertible<decltype(std::declval<const T&>() > std::declval<const U&>()), bool>::value), "");
static_assert((std::is_convertible<decltype(std::declval<const T&>() >= std::declval<const U&>()), bool>::value), "");
}
// Test all two comparison operations for sanity
template <class T, class U = T>
TEST_CONSTEXPR_CXX14 bool testComparisons2(const T& t1, const U& t2, bool isEqual)
{
if (isEqual)
{
if (!(t1 == t2)) return false;
if (!(t2 == t1)) return false;
if ( (t1 != t2)) return false;
if ( (t2 != t1)) return false;
}
else /* not equal */
{
if ( (t1 == t2)) return false;
if ( (t2 == t1)) return false;
if (!(t1 != t2)) return false;
if (!(t2 != t1)) return false;
}
return true;
}
// Easy call when you can init from something already comparable.
template <class T, class Param>
TEST_CONSTEXPR_CXX14 bool testComparisons2Values(Param val1, Param val2)
{
const bool isEqual = val1 == val2;
return testComparisons2(T(val1), T(val2), isEqual);
}
template <class T, class U = T>
void AssertComparisons2AreNoexcept()
{
ASSERT_NOEXCEPT(std::declval<const T&>() == std::declval<const U&>());
ASSERT_NOEXCEPT(std::declval<const T&>() != std::declval<const U&>());
}
template <class T, class U = T>
void AssertComparisons2ReturnBool()
{
ASSERT_SAME_TYPE(decltype(std::declval<const T&>() == std::declval<const U&>()), bool);
ASSERT_SAME_TYPE(decltype(std::declval<const T&>() != std::declval<const U&>()), bool);
}
template <class T, class U = T>
void AssertComparisons2ConvertibleToBool()
{
static_assert((std::is_convertible<decltype(std::declval<const T&>() == std::declval<const U&>()), bool>::value), "");
static_assert((std::is_convertible<decltype(std::declval<const T&>() != std::declval<const U&>()), bool>::value), "");
}
#endif // TEST_COMPARISONS_H
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